u-boot/board/compal/paz00/paz00.c
Stephen Warren 72573543b5 ARM: tegra: enable 8-bit SD slots in board files
Harmony contains an SD slot with all 8 bits routed. This allows plugging
in an eMMC-chip-in-SD-form-factor.

Seaboard/Springbank/Ventana/AC100 all have an eMMC chip with all 8 bits
hooked up.

Now that the U-Boot eMMC code fully supports 8-bit operation, initialize
those ports as 8-bit instead of 4-bit to improve performance.

Whistler was already registering its ports as 8-bit.

TrimSlice doesn't have any 8-bit ports.

I don't have any Avionic Design boards nor the Colibri board to test with.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2012-11-19 08:15:42 -07:00

73 lines
1.9 KiB
C

/*
* Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/tegra.h>
#include <asm/arch/pinmux.h>
#include <asm/arch-tegra/mmc.h>
#include <asm/gpio.h>
#ifdef CONFIG_TEGRA_MMC
#include <mmc.h>
#endif
#ifdef CONFIG_TEGRA_MMC
/*
* Routine: pin_mux_mmc
* Description: setup the pin muxes/tristate values for the SDMMC(s)
*/
static void pin_mux_mmc(void)
{
/* SDMMC4: config 3, x8 on 2nd set of pins */
pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
pinmux_tristate_disable(PINGRP_ATB);
pinmux_tristate_disable(PINGRP_GMA);
pinmux_tristate_disable(PINGRP_GME);
/* SDIO1: SDIO1_CLK, SDIO1_CMD, SDIO1_DAT[3:0] */
pinmux_set_func(PINGRP_SDIO1, PMUX_FUNC_SDIO1);
pinmux_tristate_disable(PINGRP_SDIO1);
/* For power GPIO PV1 */
pinmux_tristate_disable(PINGRP_UAC);
/* For CD GPIO PV5 */
pinmux_tristate_disable(PINGRP_GPV);
}
/* this is a weak define that we are overriding */
int board_mmc_init(bd_t *bd)
{
debug("board_mmc_init called\n");
/* Enable muxes, etc. for SDMMC controllers */
pin_mux_mmc();
debug("board_mmc_init: init eMMC\n");
/* init dev 0, eMMC chip, with 8-bit bus */
tegra_mmc_init(0, 8, -1, -1);
debug("board_mmc_init: init SD slot\n");
/* init dev 3, SD slot, with 4-bit bus */
tegra_mmc_init(3, 4, GPIO_PV1, GPIO_PV5);
return 0;
}
#endif